Browse Publications Technical Papers 2019-28-0089

Performance Assessment of Pyramidal Lattice Core Sandwich Engine Hood For Pedestrian Safety 2019-28-0089

Usage of car increases every year, the accidents are mainly caused due to the carelessness of pedestrian or driver. Pedestrian accidents results in head trauma or death. It is necessary to manufacture the hood with the material which will absorb impact energy rather than transmitting it to head of the pedestrian. Safety devices such as airbags, energy absorbing steering columns, seat belts which were successfully designed and installed in the automobiles but this will reduce the damage to the persons sitting inside the car. There were no safety devices for pedestrians. GFRP pyramidal lattice core structures are used in automobiles which is used for good energy absorption. Glass fibre reinforced polymer are used for light weight, high strength. In this work, we have analysed GFRP pyramidal lattice core sandwich engine hood in ANSYS workbench under impact loading. For the finite element modelling the materials properties are taken from the previous literature. The results of finite element modelling of pyramidal lattice core sandwich engine hood yield lesser HIC values. This shows GFRP pyramidal lattice core absorbs more impact energy from the pedestrian head. HIC means head injury criterion, it determines the probability of getting head injury from the accident. HIC values should be lesser than 1000 for an optimistic design of the hood. Our engine hood is made of GFRP. It consists of lattice pyramidal core which is sandwiched between two face sheets. AS discussed earlier GFRP pyramidal core absorbs more impact energy, this will lead to reduction of HIC value.


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